<?php
	include 'Zend/Loader/Autoloader.php';
	$loader = Zend_Loader_Autoloader::getInstance();
	$loader->setFallbackAutoloader(true);
	
$captcha_session = new Zend_Session_Namespace('captcha'); //在默认构造函数里实例化
echo 'session code: '.$captcha_session->code;